AntimetabolitesAntimetabolites, AntineoplasticTetrahydrouridineFloxuridineTrabeculectomyInosine MonophosphatePhosphoribosyl PyrophosphateFluorouracilMitomycin6-MercaptopurineMethotrexateLeukemia L1210Folic Acid AntagonistsCytarabinePurinesSubstance PAntineoplastic AgentsDrug SynergismDrug Screening Assays, AntitumorDeoxycytidineDrug Evaluation, PreclinicalCell SurvivalTumor Cells, CulturedNeoplasmsCell DivisionCell CycleCell LineKineticsSubstance-Related Disorders